In "How Things Work in the House," Lisa Campbell Ernst delves into how common household objects--such as soap, scissors and house keys--work. The detailed, but easy-to-understand, language describes the functioning of everyday items, and Ernst's meticulous and cleverly labeled pictures are fascinating. "How Things Work in the House" is a marvelous companion to the much-praised "How Things Work Around the Yard." It also stands on its own as kid-compelling non-fiction.